linux-kernel - Re: [PATCH v2 2/4] fs/afs/rxrpc: Remove deprecated create_singlethread

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Message-ID: <20160831144054.GW12660@htj.duckdns.org>
Date:   Wed, 31 Aug 2016 10:40:54 -0400
From:   Tejun Heo <tj@...nel.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Bhaktipriya Shridhar <bhaktipriya96@...il.com>,
        linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] fs/afs/rxrpc: Remove deprecated
 create_singlethread_workqueue

On Tue, Aug 30, 2016 at 11:15:43PM +0100, David Howells wrote:
> Bhaktipriya Shridhar <bhaktipriya96@...il.com> wrote:
> 
> > The workqueue "afs_async_calls" queues a single work item viz
> > &call->async_work and hence it doesn't require execution ordering.
> > ...
> > Since there are fixed number of work items, explicit concurrency
> > limit is unnecessary here.
> 
> There can be more than one single call and there's no fixed number.
> 
> > The workqueue "afs_lock_manager" queues a single work item
> > &vnode->lock_work, and hence it doesn't require execution ordering.
> > ...
> > Since there are fixed number of work items, explicit concurrency
> > limit is unnecessary here.
> 
> There may be more than one single vnode and there's no fixed number.

Ah, okay, the work items are dynamically allocated.  Do they need
strict execution ordering or can they be executed concurrently?

Thanks.

-- 
tejun